1 ; Test that the strpbrk library call simplifier works correctly.
3 ; RUN: opt < %s -instcombine -S | FileCheck %s
5 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
7 @hello = constant [12 x i8] c"hello world\00"
8 @w = constant [2 x i8] c"w\00"
9 @null = constant [1 x i8] zeroinitializer
11 declare i8* @strpbrk(i8*, i8*)
13 ; Check strpbrk(s, "") -> NULL.
15 define i8* @test_simplify1(i8* %str) {
16 ; CHECK-LABEL: @test_simplify1(
17 %pat = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
19 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
21 ; CHECK-NEXT: ret i8* null
24 ; Check strpbrk("", s) -> NULL.
26 define i8* @test_simplify2(i8* %pat) {
27 ; CHECK-LABEL: @test_simplify2(
28 %str = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
30 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
32 ; CHECK-NEXT: ret i8* null
35 ; Check strpbrk(s1, s2), where s1 and s2 are constants.
37 define i8* @test_simplify3() {
38 ; CHECK-LABEL: @test_simplify3(
39 %str = getelementptr [12 x i8], [12 x i8]* @hello, i32 0, i32 0
40 %pat = getelementptr [2 x i8], [2 x i8]* @w, i32 0, i32 0
42 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
44 ; CHECK-NEXT: ret i8* getelementptr inbounds ([12 x i8], [12 x i8]* @hello, i32 0, i32 6)
47 ; Check strpbrk(s, "a") -> strchr(s, 'a').
49 define i8* @test_simplify4(i8* %str) {
50 ; CHECK-LABEL: @test_simplify4(
51 %pat = getelementptr [2 x i8], [2 x i8]* @w, i32 0, i32 0
53 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
54 ; CHECK-NEXT: [[VAR:%[a-z]+]] = call i8* @strchr(i8* %str, i32 119)
56 ; CHECK-NEXT: ret i8* [[VAR]]
59 ; Check cases that shouldn't be simplified.
61 define i8* @test_no_simplify1(i8* %str, i8* %pat) {
62 ; CHECK-LABEL: @test_no_simplify1(
64 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
65 ; CHECK-NEXT: %ret = call i8* @strpbrk(i8* %str, i8* %pat)
67 ; CHECK-NEXT: ret i8* %ret